623443 has 4 divisors (see below), whose sum is σ = 628480. Its totient is φ = 618408.

The previous prime is 623437. The next prime is 623477. The reversal of 623443 is 344326.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2328 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (157120).

2⁶²³⁴⁴³ is an apocalyptic number.

623443 is a deficient number, since it is larger than the sum of its proper divisors (5037).

623443 is a wasteful number, since it uses less digits than its factorization.

623443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036.

The product of its digits is 1728, while the sum is 22.

The square root of 623443 is about 789.5840677217. The cubic root of 623443 is about 85.4277400939.

Adding to 623443 its reverse (344326), we get a palindrome (967769).

The spelling of 623443 in words is "six hundred twenty-three thousand, four hundred forty-three".